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The interaction of pyridate and 2,4-DB in peanut (Arachis hypogaea), Florida beggarweed (Desmodium tortuosum), and sicklepod (Senna obtusifolia)

Published online by Cambridge University Press:  12 June 2017

T. Vint Hicks ,
Glenn R. Wehtje  and
Timothy L. Grey
T. Vint Hicks
Affiliation:
Valent Corporation, 7607 Eastmark Drive, Suite 108, College Station, TX 77840
Timothy L. Grey
Affiliation:
1733 North Longgrove Road, Cecilia, KY 42724
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Abstract

Tank-mixed combinations of pyridate and 2,4-DB were synergistic with respect to sicklepod control and independent with respect to Florida beggarweed control and peanut tolerance in greenhouse studies. Leaf absorption of 14C-pyridate was generally enhanced by the addition of 2,4-DB. Translocation of 14C-pyridate out of the treated leaf did exceed 21% of the amount absorbed across all species, and 14C-pyridate was not affected by the addition of 2,4-DB. Sensitivity of peanut, Florida beggarweed, and sicklepod to pyridate was independent of both adsorption and translocation. Metabolic detoxification of pyridate into a benign metabolite was highest in the tolerant peanut, lowest in highly susceptible Florida beggarweed, and intermediate in slightly susceptible sicklepod. Absorption of 14C-2,4-DB by peanut was increased by approximately 10% with the addition of pyridate. No such increase was observed in either Florida beggarweed or sicklepod. Translocation of 14C-2,4-DB out of the treated leaf was not affected by the addition of pyridate in any of the three species evaluated.

Keywords

Pyridate2,4-DBFlorida beggarweed [Desmodium tortuosum (SW.) DC. DEDTO]peanut (Arachis hypogaea L. ARAHY)sicklepod (Senna obtusifolia L. CASOB)Absorptionmetabolismherbicide interactionDEDTOARAHYCASOB
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 46 , Issue 3 , June 1998 , pp. 284 - 288
Copyright
Copyright © 1998 by the Weed Science Society of America 

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